Knife shaft



FIG. 1 is a left side perspective view from above of the knife shaft showing our new design;

FIG. 2 is a left side perspective view from below of the knife shaft of FIG. 1;

FIG. 3 is a left side elevational view of the knife shaft of FIGS. 1 and 2;

FIG. 4 is a right side elevational view of the knife shaft of FIGS. 1-3;

FIG. 5 is a bottom plan view of the knife shaft of FIGS. 1-4;

FIG. 6 is a top plan view of the knife shaft of FIGS. 1-5; and,

FIG. 7 is a rear elevational view of the knife shaft of FIGS. 1-6.

The broken lines are shown for the purpose of illustrating parts of the article that form no part of the claim. 

CLAIM The ornamental design for a knife shaft, as shown and described. 